Post binder



L. M. PARKER PsT-BINDER F" Y Dec. 22. 19'21 A 2 vSmets-Sheet 1 2. pff ff@if 571,024

Sept. 29, 1925. 1,555,070

L. M. PARKER PosT BINDER Filed Dec. 22, 1921 2 Sheets-Sheet 2 Inveno".56,5 i@ JPaV/er Patented Sept. 29, 1925.

UNITED STATES LESLIE 1VI. PARKER, 0F EVANSTON, ILLINOIS.

POST BINDER.

Application filed December 22, 1921. Serial No. 524,065.

T all whom t 'may concern.'

Be it known that I, LESLIE M. PARKER, a citizen of the United States,residing at Evanston, in the countyof Cook and State of Illinois, haveinvented a certain new and useful Improvement in Post Binders, of whichthe following is a specification.

This invention relates to binders for holding loose leaf sheets andparticularly to a binder intended for use in connection with perforatedsheets. One object of the invention is to provide in such a binder aconstruction wherein the attaching means or posts do not extend ateither end beyond the normalV thickness of the binder. An-

other object is to provide in such abinder a construction whereby thebacks of the binder may be readily and immediately attached or detached.Other objects will appear from time to time throughout the specificationand claims. The invention is illustrated more or less diagrammaticallyin the accompanying drawings, wherein:

Fig. l is a plan View of the binder;

Fig. 2 is a vertical section taken on the line 2-2 ofFig. l;

Fig. 3 is a section on line 3-3 of Fig. l;

Fig. 4L is av section on an enlarged scale taken on line 4 4 of Fig. 3;

Fig. 5 is a detailed side elevation of the attaching` means;

Figure 6y is a modified form of the fastening mechanism;

Figure 7 is a'further modification;

Figure 8 is a partial sectional view taken on line 8-8 of Figure 2.

Figure 9 is a partial sectional view of the form of the device shown inFigure` 6 in place;

Figure l0 is a similar view showing the form of the device shown inFigure 7 in place.

Like parts are designated by like characters throughout.

A, A' are binder covers hingedrespectively to backs A2, A3. The back A2,which is preferably tubular, is provided in its upper surface with thelongitudinal depression A4. It is perforated to receive the upperfasten- 50 ing members B which are mounted for rotation and providedalong the greater part ofv their length with two oppositely positionedrows of notches B', B' and with two oppositely positioned' smoothsurfaces B2,

yc'iently to receive the washer.

means of the springs B6, but they may be.

raised in opposition to the springs.

The back member A3 is perforated for the reception of the lower holdingmeans C.4 The holding means C comprises a lower laterally extendingportion and the two upwardly extending arms C', C.r which termif nate 1ntheir upper ends in downwardly bent hool points Gzwhich are adapted toengage the notches B on the member B.-

In Figure 6 I have shown a modified form in which the central member Mis shaped in much the same manner as member B in Fig. 2, but instead ofbeing provided with interrupted screw threads such as in Fig. 2 thereare provided instead lateral extensions M', M', and the upwardextensions M2. of the lower member are provided with rigid inwardlyextending parts K', K. In this construction the parts cannot be sprunginto place since the parts K K are rigid. It is necessary to rotate themember Mso that the members M' will not contact the parts K'. In thisposition the smooth sides of the member M come opposite the parts K'.When the two members have been pressed together sufliciently: to holdthesheets, the member M is then rotated and the extensions M engage theparts K and the two members are held against relative longitudinalmovement. The members M2 are in contact with the interior of theperforation and they are thusy held against outward separation` and soare held in proper relation to themember M for engagement with` thismember,

In Figure 7 the member F is generally similar to member B shown inFigure 3. I have provided, however, for the ends of the upwardlyextending arms Gr4 screwthreaded portions G which form part of aninterrupted screw-thread, andthe arms G bear against the inside of theperforations in the paper. Thus the arms G are held in proper positionby theircontact with the interior walls of the perforation in the samemanner as above described, and they are thus held against outwardlateral displacement and are held in proper engagingcontact with themember F, and particularly with the screw-threaded portions F.

I have shown an operative invention, still it will be obvious that manychanges of form, shape and relation of parts kmay be made withoutdeparting materially from the spirit of my invention, and I wishtherefore that my showing be taken as in a sense diagrammatical. Inparticular, while I have shown the upper holding members as rotatableaiid the lower holding members as stationary, it will be obvious thatthis arrangement might be reversed.

The use and operation of the invention is 'as follows:

The lower binder cover is` laid upon its back with the securing membersextending upwardly. Perforated sheets are then placed upon thesemembers. The sheets may-either be threaded upon the securing members orthey may be placed upon them by bending the edges of the paper adjacentthe perforation. Vhen the desired quantity of sheets have been soplaced, the upper cover of the binder is placed in position so that theupper holding members vmate with the lower holding members and the twoare then pressed together. In the form shown in Figs. l to 5 inclusive,the members may be sprung together since the lower holding member is aspring member. In the form shown on the remaining figures, it isnecessary to rotate the upper holding members so that the threadedportions upon them correspond to the interruptions in the threadedportions on the lower holding members or vice versa. When this is donethe construction of the modified form may be forced together until thepapers are firmly held and then the holding means separately or togetherare rotated, so that the threaded portions on the upper and lowerholding members engage each other. In this form the upper end of thethiinble always rests upon the top sheet and thus, even though the uppercover of the binder be removed, the papers will constantly be held inorder and will always bear against a circular holding member.

IVhen it is desired to remove sheets from the binder the upper holdingmembers are rotated so that they no longer engage with the lower holdingmembers and the binder covers may then be separated and the sheetsremoved. As above pointed out the upper holding members may be rotatedsingly or together. c

In the first formillustrated, in Vorder to rotate the upper holdingmembersthe small handles upon them are raised, in opposition to the leafsprings, suiiiciently to clear the edge of the depression in which theynorrotated to free the two holding members and thus to permit separationof the binder.

In all lforms of the device shown the outer member of the fastener is incontact with the interior walls of the perforations within which itlies.

I claim:

1. In a binder for perforated sheets, a pair of backs in combinationwith a fastening device comprising two interlocking parts one mounted oneach of said backs, and one of them adapted to surround and grip theother, said parts held against relative longitudinal movement when inone relative position and free to -have relative longitudinal movementwhen rotated fromsucli position, said interlocking parts adapted to beheld against lateral movement by the contact of one of them with theinterior of the perforations of said sheets.

2. In a binder for perforated sheets a pair of backs in combination witha plurality of fastening devices each comprising two interlocking parts,one mounted on each of said backs, and one of them adapted to surroundand grip the other, said parts held against relative longitudinalmovement when in one relative position and free to have relativelongitudinal movement when rotated from such position, said interlockingpart-s adapted to be held against lateral movement by the contact of oneof them with the interior of the perforations of said sheets.

B. In a fastening device for securing together a plurality ofperforatedsheets, a pair of members one adapted to surround and grip theother, said surrounding member provided with extended arms, said armsprovided adjacent their upper ends upon their inner faces with screwthreads,`said surrounded member provided with oppositely positioned rowsof screw threads and oppositely placed smooth areas between such screwthreads, said members adapted to have relative llongitudinal movementwhen said smooth areas are in opposition to said screw threads on Vsaidarms, said members adapted to be rotated so as to bring the screwthreads upon said arms in engagement with those upon said surroundedmember, said members held against relative longitudinal movement whensaid screw threads are so engaged.

v- 4t. -In a binder for perforated sheets,a

pair of backs in combination with a fastening device comprising twointerlocking parts one mounted on each of said backs and adapted forrelative rotation, and one, of them adapted to surround and grip theother, said parts held against relative longitudinal movement when inone relative position and free to have relative longitudinal movementwhen rotated from such position,

mally lie and they may then be suiiiciently said interlocking parts heldagainst lateral movement by the contact of one of them with the interiorof said perforation.

5. In a binder for perforated sheets, a pair of backs in combinationwith a plurality of fastening devices each comprising two interlockingparts, one mounted on each of said backs and adapted for relativerotation, and one of them adapted to surround and grip the other, saidparts held against relative longitudinal movement when in one relativeposition and free to have relative longitudinal movement when rotatedfrom such position, said interlocking parts held against lateralmovement by the Contact -of one of them with the interior of said perforation.

6. In a fastening device for securing together a plurality of perforatedsheets, a pair of members one adapted to surround and grip the other,said surrounding member provided with extended arms, said arms providedadjacent their upper ends upon their inner faces with screw threads,said surrounded member provided with oppositely positioned rows of screwthreads and oppositely placed smooth areas between such screw threads,said members adapted to have relative longitudinal movement when saidsmooth areas are in opposition to said screw threads on said arms, saidmembers adapted to be rotated so as to bring the screw threads upon saidarms in engagement with those upon said surrounded member, said membersheld against relative longitudinal movement when said screw threads areso engaged, the arms of said surrounding member being held againstlateral movement by their contact with the interior of said perforation.

7. In a binder, a back portion and a fastening member mounted forrotation therein, a depression in said back and a pivoted handle on saidfastening member adapted normally to lie within said depression andthereby to prevent rotation of the fastening member and adapted to bemoved out of said depression and to permit rotation of said fasteningmember.

8. In a binder, a back portion and a fastening member mounted forrotation therein, a depression in said back and a pivoted handle on saidfastening member adapted normally to lie within said depression andthereby to prevent rotation of the fastening member and adapted to bemoved out of said depression and to permit rotation of said fasteningmember, and a spring adapted normally to hold the handle within saiddepression.

9. In a fastening device for securing together a plurality of perforatedsheets, a pair of members one adapted to surround and grip the other,said surrounding member provided with upwardly extended arms, said armsprovided with inwardly extending rigid projections, said surroundedmember provided with oppositely positioned rows of correspondingprojections and oppositely placed smooth areas between said projections,said members adapted to have relative longitudinal movement when saidsmooth areas are in opposition to said projections on said arms, saidmembers adapted to be rotated so as to bring the projections upon saidarms in engagement with those upon said surrounded member, said membersheld against relative longitudinal movement when said projections are soengaged.

Signed at Chicago county of Cook and State of Illinois, this 20th day ofDecember 1921.

LESLIE M. PARKER.

